Re: [PATCH 0/8] x86/ftrace: Add direct batch interface

[Jiri Olsa]

On Wed, Sep 01, 2021 at 08:23:38AM -0700, Alexei Starovoitov wrote:
> On Tue, Aug 31, 2021 at 2:50 AM Jiri Olsa <jolsa@xxxxxxxxxx> wrote:
> >
> > hi,
> > adding interface to maintain multiple direct functions
> > within single calls. It's a base for follow up bpf batch
> > attach functionality.
> >
> > New interface:
> >
> >   int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr)
> >   int unregister_ftrace_direct_multi(struct ftrace_ops *ops)
> >   int modify_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr)
> >
> > that allows to register/unregister/modify direct function 'addr'
> > with struct ftrace_ops object. The ops filter can be updated
> > before with ftrace_set_filter_ip calls
> >
> >   1) patches (1-4) that fix the ftrace graph tracing over the function
> >      with direct trampolines attached
> >   2) patches (5-8) that add batch interface for ftrace direct function
> >      register/unregister/modify
> >
> > Also available at (based on Steven's ftrace/core branch):
> >   https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
> >   ftrace/direct
> 
> Steven,
> 
> Could you review and merge this set for this merge window,
> so we can process related bpf bits for the next cycle?

actually I might have sent it out too early, there's still
bpf part review discussion that might end up in interface
change

review would be great, but please hold on with the merge

thanks,
jirka